Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima 739-8526, Japan.
Phys Rev Lett. 2010 Aug 13;105(7):076804. doi: 10.1103/PhysRevLett.105.076804.
Strong spin polarization of the photocurrent from bulk continuum states of Bi(111) is experimentally observed. On the basis of ab initio one-step photoemission theory the effect is shown to originate from the strong polarization of the initial states at the surface and to be the result of the surface sensitivity of photoemission. Final state effects cause deviations of the k{∥} dependence of polarization from strictly antisymmetric relative to Γ.
实验观察到 Bi(111)体连续态光电流的强自旋极化。基于第一性原理单步光发射理论，表明该效应源于表面初始态的强极化，并归因于光发射的表面灵敏度。最终态效应导致极化的 k{∥}依赖性相对于 Γ 偏离严格的反对称性。
